diff --git a/phpBB/develop/adjust_uids.php b/phpBB/develop/adjust_uids.php
new file mode 100755
index 0000000000..d301f3cadb
--- /dev/null
+++ b/phpBB/develop/adjust_uids.php
@@ -0,0 +1,129 @@
+<?php
+/**
+* Repair bbcodes converted with RC6
+*
+* You should make a backup from your users, posts and privmsgs table in case something goes wrong
+* Forum descriptions and rules need to be re-submitted manually
+*
+*/
+die("Please read the first lines of this script for instructions on how to enable it");
+
+set_time_limit(0);
+@ini_set('memory_limit', '512M');
+
+define('IN_PHPBB', true);
+$phpbb_root_path = './../';
+$phpEx = substr(strrchr(__FILE__, '.'), 1);
+include($phpbb_root_path . 'common.'.$phpEx);
+
+// Start session management
+$user->session_begin();
+$auth->acl($user->data);
+$user->setup();
+
+$echos = 0;
+
+
+// Adjust user signatures
+$sql = 'SELECT user_id, user_sig, user_sig_bbcode_uid
+	FROM ' . USERS_TABLE . '
+	ORDER BY user_id ASC';
+$result = $db->sql_query($sql);
+
+while ($row = $db->sql_fetchrow($result))
+{
+	$bbcode_uid = $row['user_sig_bbcode_uid'];
+
+	// Only if a bbcode uid is present, the signature present and a size tag used...
+	if (!empty($bbcode_uid) && strpos($row['user_sig'], $bbcode_uid) === false)
+	{
+		$row['user_sig'] = preg_replace('/\:[0-9a-z]{8}\]/', ":$bbcode_uid]", $row['user_sig']);
+
+		$sql = 'UPDATE ' . USERS_TABLE . " SET user_sig = '" . $db->sql_escape($row['user_sig']) . "'
+			WHERE user_id = " . $row['user_id'];
+		$db->sql_query($sql);
+
+		if ($echos > 200)
+		{
+			echo '<br />User: ' . "{$row['user_id']}\n";
+			$echos = 0;
+		}
+
+		echo '.';
+		$echos++;
+
+		flush();
+	}
+}
+$db->sql_freeresult($result);
+
+
+// Now adjust posts
+$sql = 'SELECT post_id, post_text, bbcode_uid, enable_bbcode
+	FROM ' . POSTS_TABLE . '
+	ORDER BY post_id ASC';
+$result = $db->sql_query($sql);
+
+while ($row = $db->sql_fetchrow($result))
+{
+	$bbcode_uid = $row['bbcode_uid'];
+
+	// Only if a bbcode uid is present, bbcode enabled and a size tag used...
+	if ($row['enable_bbcode'] && !empty($bbcode_uid) && strpos($row['post_text'], $bbcode_uid) === false)
+	{
+		$row['post_text'] = preg_replace('/\:[0-9a-z]{8}\]/', ":$bbcode_uid]", $row['post_text']);
+		
+		$sql = 'UPDATE ' . POSTS_TABLE . " SET post_text = '" . $db->sql_escape($row['post_text']) . "'
+			WHERE post_id = " . $row['post_id'];
+		$db->sql_query($sql);
+
+		if ($echos > 200)
+		{
+			echo '<br />Post: ' . "{$row['post_id']} \n";
+			$echos = 0;
+		}
+
+		echo '.';
+		$echos++;
+
+		flush();
+	}
+}
+$db->sql_freeresult($result);
+
+// Now to the private messages
+$sql = 'SELECT msg_id, message_text, bbcode_uid, enable_bbcode
+	FROM ' . PRIVMSGS_TABLE;
+$result = $db->sql_query($sql);
+
+while ($row = $db->sql_fetchrow($result))
+{
+	$bbcode_uid = $row['bbcode_uid'];
+
+	// Only if a bbcode uid is present, bbcode enabled and a size tag used...
+	if ($row['enable_bbcode'] && !empty($bbcode_uid) && strpos($row['message_text'], $bbcode_uid) === false)
+	{
+		$row['message_text'] = preg_replace('/\:[0-9a-z]{8}\]/', ":$bbcode_uid]", $row['message_text']);
+		
+		$sql = 'UPDATE ' . PRIVMSGS_TABLE . " SET message_text = '" . $db->sql_escape($row['message_text']) . "'
+			WHERE msg_id = " . $row['msg_id'];
+		$db->sql_query($sql);
+
+		if ($echos > 200)
+		{
+			echo '<br />' . "\n";
+			$echos = 0;
+		}
+
+		echo '.';
+		$echos++;
+
+		flush();
+	}
+}
+$db->sql_freeresult($result);
+
+// Done
+$db->sql_close();
+echo 'done';
+?>
\ No newline at end of file